Comparison

DayDo Calendar vs SecondBrain

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

DayDo Calendar

Organize your daily life with a unified planner that integrates calendars, reminders, routines, and smart alarms. This app offers a modern approach to planning, helping you manage your schedule and personal habits efficiently in a single, elegant interface.

Highlights
  • Integrated calendar
  • Daily reminders
  • Recurring routines
  • Smart alarms
  • Elegant interface
  • Personal habit management
Features
Read full description

Keep your calendar, reminders, daily routines, and smart alarms all in one place. This app brings a modern way to plan your day, stay organized, and manage your personal routine more effectively. It combines a calendar, reminders, recurring daily habits, smart alarms, and other useful information in one elegant environment. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://ondrejho.github.io/DayDo/policy.html

About

SecondBrain

This app automatically transcribes, titles, and files your spoken thoughts, creating a self-organizing note system. It can convert voice notes into calendar events, provide daily summaries, and allow you to chat with your saved information.

Highlights
  • Automatic transcription and titling
  • AI-powered self-organizing notes
  • Voice to calendar event creation
  • Daily morning briefing summaries
  • Chat with your notes for answers
  • 3D brain graph visualization
  • Full-text search
  • Cross-app sharing
Features
Read full description

Most of what you hear, think and plan today is gone by tomorrow. Speak your mind. SecondBrain writes it down, gives it a title, and files it for you. No folders to manage. No typing. Just talk, and your thoughts organize themselves. The AI note app for people who think out loud. WHY SECONDBRAIN • Capture in seconds: speak, type, or share a thought and it is saved instantly • Zero organizing: AI transcribes, titles, and files every note into a self-building folder tree • Voice to schedule: say "dentist Tuesday 4pm" and it creates real events in Calendar and Reminders • Morning briefing: wake up to a daily summary of your day and what matters • Ask your brain: chat with your notes and get answers from everything you have saved • Brain graph: explore your ideas as a living 3D map of connected notes • Search everything: full-text search finds any note in an instant • Share from anywhere: send text, links, images, or audio from any app into SecondBrain • 20+ languages: speak in your language and get replies in your language BUILT FOR BUSY MINDS Founder juggling clients, student capturing lectures, or just someone with too many thoughts to hold? SecondBrain is the frictionless place to put them all. Brain-dump on the go and let the AI do the filing. WORKS WHERE YOU DO Your notes sync to the web at app.secondbrain.icu. Pro users can connect SecondBrain as memory for AI assistants through the MCP connector. SECONDBRAIN PRO Go unlimited: unlimited notes, unlimited AI capture and answers, plus the AI assistant connector. Start with a free trial, then subscribe yearly or monthly. Cancel anytime. Payment is charged to your Apple ID. Subscriptions renew automatically unless canceled at least 24 hours before the end of the current period. Manage or cancel anytime in your App Store account settings. Terms of use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy policy: https://secondbrain.icu/privacy

Screenshots

DayDo Calendar4 screens
SecondBrain4 screens

Verdict

The call

The clearest difference is rating: SecondBrain at 5.0 against DayDo Calendar's 4.0. SecondBrain also leads on update cadence (every 3 days vs every 3 weeks) and device support (3 vs 1). On price, ratings volume, ads and in-app purchases there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. DayDo Calendar sells 3 in-app purchases, starting at $1.99 per month and SecondBrain sells 3 in-app purchases, starting at $8.99 per month. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

SecondBrain holds the better App Store score, 5.0 against 4.0. Both are backed by a comparable volume of ratings — 2 and 3 respectively.

UpkeepUpdate frequency

DayDo Calendar ships an update every 3 weeks, SecondBrain every 3 days. The most recent releases landed on September 8, 2026 and September 24, 2026 respectively.

Scorecard4 real differences · 5 level
DayDo Calendar versus SecondBrain: the parameters behind the verdict, then further details
ParameterDayDo CalendarSecondBrain
PriceFreeFree
Rating4.0 (2 ratings)5.0 (3 ratings) — better
Number of ratings23 — better
Update frequencyEvery 3 weeksEvery 3 days — better
AdsYesYes
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhoneiPhone, iPad, iPod — better
Requires iOS26.015.1 — better
Further details — not scored
Size121 MB72 MB
Age rating4+4+
DeveloperOndrej HorakFederico Cesarini

In-app purchases

3 purchases

DayDo Calendar

Subscriptions2
  • Monthly PRO14 Days trial$1.991 Month
  • Yearly PRO14 Days trial$19.991 Year
One-time1
  • Lifetime PRO$99.99
3 purchases

SecondBrain

Subscriptions3
  • SecondBrain Pro$8.991 Month
  • SecondBrain Pro Yearly3 Days trial$34.991 Year
  • SecondBrain Pro Yearly3 Days trial$44.991 Year

Questions

Is DayDo Calendar free?
DayDo Calendar is free to download, with in-app purchases available.
Is SecondBrain free?
SecondBrain is free to download, with in-app purchases available.
Which has better reviews, DayDo Calendar or SecondBrain?
SecondBrain is rated higher. DayDo Calendar averages 4.0 out of 5 from 2 ratings, while SecondBrain averages 5.0 from 3 ratings.
Do DayDo Calendar or SecondBrain have ads?
Both DayDo Calendar and SecondBrain show ads.
Which is updated more often, DayDo Calendar or SecondBrain?
DayDo Calendar ships an update every 3 weeks, and SecondBrain every 3 days. Most recently, DayDo Calendar was updated on September 8, 2026 and SecondBrain on September 24, 2026.

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